ModelWriter

Remarks

ModelReader's other half, and it is here for the same reason that one is. docs/plan/41 § D16 and docs/plan/42 § D13 both give the batch surface as vixen remesh in.glb out.glb, which is a read through Assimp and a write that Assimp does not do for us. Putting the write beside the read means the CLI links one assembly to do a round trip rather than two that disagree about what a mesh is.

⚠ MeshExport in Vixen.Editor.SceneView writes glTF too, and this is not it. That one takes doc 24's ExportPiece — a kernel mesh, a world transform and a name, straight out of a scene document — and lives in the viewport assembly, which carries the whole UI stack. A batch tool that took that reference to write a file would link a renderer and a control library to run on a build server. The overlap is the glTF envelope and it is about eighty lines; the alternative was moving the exporter down into an assembly the viewport must not depend on, and doc 24's IMeshBaker exists precisely because Vixen.Editor.SceneView does not reference the asset database.

⚠ The format is chosen by extension and an unknown one is refused rather than guessed. Writing glTF into a file called .fbx produces something no tool opens and every tool blames on the mesh.

Fields and properties (1)

• public static IReadOnlyList<string> Extensions

  Every extension this writes, with their dots, in the order a help string wants them.

Methods (7)

• public static bool CanWrite(string? path)

  Whether a path names a format this can write.

• public static void Write(string path, IReadOnlyList<MeshData> meshes, string name = "Mesh")

  Writes meshes in whichever format the path's extension names.

• public static void Write(string path, IReadOnlyList<PolygonMesh> meshes, string name = "Mesh", TextWriter? warnings = null)

  Writes meshes whose faces have however many sides they have.

• public static string Obj(IReadOnlyList<MeshData> meshes)

  Writes meshes as a Wavefront OBJ.

• public static string Obj(IReadOnlyList<PolygonMesh> meshes)

  Writes meshes as a Wavefront OBJ, keeping every face at the number of sides it has.

• public static string Gltf(IReadOnlyList<MeshData> meshes, string name = "Mesh")

  Writes meshes as a self-contained glTF 2.0 document with its buffer inlined.

• public static byte[] Glb(IReadOnlyList<MeshData> meshes, string name = "Mesh")

  Writes meshes as a binary glTF container.

Used by (2)

• GeometryCommandTestsVixen.Cli.Tests
• GeometryRunnerVixen.Cli